export function uuid() {
  var s = [];
  var hexDigits = '0123456789abcdef';
  for (var i = 0; i < 36; i++) {
    s[i] = hexDigits.substr(Math.floor(Math.random() * 0x10), 1);
  }
  s[14] = '4'; // bits 12-15 of the time_hi_and_version field to 0010
  s[19] = hexDigits.substr((s[19] & 0x3) | 0x8, 1); // bits 6-7 of the clock_seq_hi_and_reserved to 01
  s[8] = s[13] = s[18] = s[23] = '-';

  var uuid = s.join('');
  return uuid;
}
export function formatParams(obj: { [key: string]: any }) {
  let params = '';
  for (let key in obj) {
    if (obj[key]) {
      params += `${key}=${obj[key]}&`;
    }
  }
  return params;
}
